■Material Processing Laboratory
03/2002, Ph.D., Doshisha University
03/1998, M.S., Doshisha University
- 1. Pilot hole deformation in progressive die forming.
- 2. Material flow in double-sided shearing.
Material flow in double-sided shearing
Shearing is widely used for many types of products because of its high productivity. However, the rollover, sheared surfaces, fractured surfaces, and burr of the cut surfaces must be reduced. It is important to clarify the relationship between the rollover shape and material flow to reduce the rollover. We have measured the material flow in double-sided shearing by using image processing. The material flow obtained by image processing is shown in Figure 1. We have investigated the formation of rollover based on the material flow obtained by image processing.
Progressive die forming
Feeding accuracy is important for progressive die forming. Generally, the sheet material is located by using a pilot pin and a pilot hole. We investigated the effect of punching on the deformation of the pilot hole experimentally.
We have performed numerical simulations by a general 3D finite element method (FEM) to clarify deformation characteristics (Figure 2). The effect of the shape of wave springs and deflection amplitude on fatigue life was discussed based on the results of the fatigue tests and numerical simulations.
- 1) M. Sasada and A. Saito, “Effect of constraint of sheet material on successful range of blanking conditions and cut surface in push-back blanking”, Transaction of the JSME , vol. 81, No.830, DOI:10.1299/transjsme.15-00136, pp. 1-9 (2015).
- 2) M. Sasada and T. Togashi, “Measurement of rollover in double-sided shearing using image processing and influence of clearance”, Procedia Engineering, vol. 81, pp. 1139–1144 (2014).
- 3)M. Sasada, Y. Kamiichi, and T. Kikuchi, “Influence of the punch penetration depth in half punching on the cut edge after shaving”, Key Engineering Materials, vol. 622–623, pp. 1081–1086 (2014).
Affiliated Academic Organizations
The Japan Society of Mechanical Engineers, The Japan Society for Technology of Plasticity, The Japan Society for Precision Engineering, Society of Automotive Engineers of Japan.
|◯ Assistant Professors: 1||◯ Postgraduates: 3|
|◯ Undergraduates: 15|